Vegetation barrier



FIG. 1 is an isometric view of a vegetation barrier showing my new design with the broken line showing of a pair of fence post being for illustrative purposes and forming no part of the claimed design;

FIG. 2 is a top view thereof;

FIG. 3 is a bottom view thereof;

FIG. 4 is a front edge view thereof;

FIG. 5 is a rear elevational view thereof;

FIG. 6 is a left side elevational view thereof; and,

FIG. 7 is a right side elevational view thereof. 

The ornamental design for the vegetation barrier, as shown and described. 